Pulley-block.



PATENTBD JAN. '7, 1908.

B. W. HAMMOND.

PULLBY BLOCK.

APPLICATION FILED JUNE 11.1901.

3 SHEETS-SHEET l.

WITNESS: INVENTOR .29e1zrze fiflairzmond ATTORNEY No. 876,176. PATENTED JAN. 7, 1908.

. 'B. w. HAMMOND.

PULLBY' BLOCK.

APPLIOATION FILED JUNE 11.1907.

3 SHEETS-SHEET 2.

INVENTOR a $877766 fi Zyjkzrem and No. 876,176. PATENTED JAN. 7, 1908 B. W. HAMMOND. PULLEY BLOCK.

UNITED STATES PATENT OFFICE.

BENNETT W. HAMMOND, OF OAKLAND, CALIFORNIA.

PULLEY-BLOCK.

T all whom it may concern:

Be it known that I, BENNETT W. HAM- MOND, a citizen of the United States, residing at Oakland,-in the county of Alameda and State of California, have invented new and useful Improvements in Pulley-Blocks, of which the following is a specification.

This invention relates to ulley blocks which can be made with a hoo k, shackle, or other means for holding the same. I

The object of the invention is to provide a sim le and effective article of this character w 'ch, in addition to the ordinary uses of this style of block, such as for hoisting and logging purposes, can also be used in water, mud, sand, or other foreign matter without injury to. its bearings.

In the drawings acompanying and forming a part of this specification I show in detail I one advantageous form of embodiment of the invention which, to enable those skilled in the art to ractice the same, will be fully set forth in t e following description, while the novelty of the invent on will be included in theclaims succeeding said description.

Referring to said drawings, Figure 1 is a cross-sectional view of a pulley block involving my invention, the hook which generally forms part of the same being in elevation. Fig. 2 1s .a side elevation of the same with a ortionof the block removed and in section. ig. 3 is a cross-sectional view of a modified form of pulley block also embodying my invention.

Like characters refer to like parts throughout the several figures of the drawings.

The device includes in its make-u a pulley or sheave which may be of any esirable character, but which is ordinarily peripherally grooved or channeled to receive a wire rope, cable, or equivalent part. The pulley or sheave shown in the drawings is denoted by 2 and it is located between the companion plates or cheeks each denoted by 3, and which, although they may be of any desirable cross-sectional shape, are illustrated as being concavo-convex within their penpheries with the concave sides next the intervening ulley. The two plates are generally in diskorm.

I have shown as fitted closely against the outer faces ofthe two plates 3 and as extending radially thereof the two S1(l8 straps 4, said straps and the plates being perforated to receive the bearing pin 5 of the pulley or Specification of Letters Patent.

Application filed June 11. 1907. Serial No. 378.429.

Patented Jan.7,1908.

sheave 2. The straps 4 extend outwardly beyond the margins of the plates 3 and at their outer ends they are shown as bridged by a bar 6, the bar being connected to the two straps in any desirable way; For exam )Ie, the outer ends of the straps may be bifurcated and the cross or bridging-bar 6 can fit between the branches of the bifurcation, while pins each denoted by '7 may be utilized for uniting the bar with the two straps. The shank of a hook as 8 is represented as swiveled to said bar 6 between the two stra s 4. The bearing pin 5 has between'its en s an enlarged portion or hub as 9 on which the pulley 2 turns, although a bu'shing'lO is illustrated as interposed betweenthe wall of the opening of the pulley and the outer surface of the enlargement or hub 9;

I prefer to locate between the two plates or cheeks 3 and the pulley 2 theplates 11 of similar nature and which are. furnished at their peripheries with inwardlyextending annular flanges 12. The two plates 11 with their annular or circular flanges 12 present what might be considered a packing box. The inner edges of the flanges 12 are se arated or spaced from the web of the pull ey 2, as clearly shown in Fig. 1, so as to obviate friction between such parts at said lace.

The opposite ends of the pinor s 1aft5 are represented as threaded to receive then'uts 13, which latter are adapted to fit against the outer faces of the two straps 4. When the nuts 13 are set up they press-onclamp the straps 4, plates 3, and plates 11 solidly against the shouldersatthe ends'of the'hu'b 9. It will be understood that the reduced ends of the pin or shaft 5 extend through the two lates 11, and the fit is a tight one. ."It't'here ore follows that, when the two plates are in abutment against the ends "of said 9, there are provided water tight jOIIIIDS l)O tween the opposite ends of said hub and-the twoplates 11.

The hub of the 'iulley 2 isshown as being somewhat wider than the' webfthereof, and around this hub at opp'ositeside's the web I prefer to fit packing rings as' 14, These rings are usually compressed, being broiight to this condition when the two plates' l'l; con-.

stituting the packing' box are potfinfplaoe. Their outer faces bear against theiirinerfa ces of the two lates 11 and hold-the latter from contact wit the pulley, so that free rotation of the latter is possible.- The packing rings 14 are, as will be seen, interposed between the pulley 2 or the huhthereof and the annu lar flanges 12, so as to prevent the entrance of water or other undesirable substance into the interiorof the pulley or toward the bearing part thereof.

I prefer to surround the circumferences of vided strips are shown as overlapped in Fig.

2. These bearing strips with the'several packing rings previously described prevent water and other foreign materials from entering the bearing surfaces of the pin 9 and pulley 2.. I, therefore, effectually prevent entrance of such foreign matters to the working or moving parts from all directions, which is an important consideration, particularly when the appliance is put to submarine use. i

The web of the pulley is represented as having cross-sectionally curved flanges 17, the presence of which produces channels at opposite sides of said Web, and in these chan nels the outer pairs of packing rings 15, strips 17, and springs 16are disposed, the

walls of the channels thus formed .holding the several parts in place. The side plates or cheeks 3 are shown as being of greater diameter than the pulley 2, by virtue of which the cable or band around the pulley-is prevented from jumping from the peripheral groove or channel therein- It might be stated, although it is b'elie'ved it will be clear upon an inspection of the drawings, that the outer pairs of packing rings 15 engage against the outer faces of the pulley 2.

.It will be evident from what has been previously set, forth that I provide'a pulley, a

journal for the pulley, and means for prevent ing the entranceof water to thejournal. When I use, the expression water I, of

course, intend to include thereby other for eign substances such as mud or dirt. The means in question are of such character that water is prevented from entering the bearing surfaces of the device axially and radially of the pulley. These results may, of course, be. accomplished in a variety of ways within the spirit of my invention, although I have hereinbefore particularly indicated one mode of procedure forobtaining the results named.

I will-now setforth a modifiedform of the dGVIlCdWhiCh possesses all the advantages following the construction illustrated in Figs.

1 and 2. j

Referring to Fig. the pulley block reprejoints with the pin or shaft 5, thepla' 'inner faces of the plates and. an.

sented thereby involves in its constru tion two side lates or members 3 connect gether, or example, by screwthree 2 sides 3 being-adapted to abut or subs tially abut against the ends of the enlarged portion or hub 9 on said pin. 'The enlarge portion of the pin or shaft 5 is provided "th a bushing 10 on which the pulley 2 tu The ends of the hub of thepulley are cont one to the inner faces of the side pla The end portions of said hub are surro by packing rings as 14. these packing rings 14 abut against'the side faces of the web of the pulley 2, while the outer faces "of said rings are contiguous to the 3. I have, shown on the inner faces of said side plates annular shoulders or ,flanges as 12 which inclose respectively the two packing rings 14" and which are in turnencircled by pairs of packing rings as 15 surrounded by springs as ;,16.. The two plates 3" are shown as bridged by a connecting bar 6 pivotally connected with the respective plates and to which the shank of a hook as 8" is swiyeled. The shaft or pin 5 may if desired be revided with a lubricating passage as 5 the outer end of which is closed by a removable screw-threaded plug as 5'.

What I claim is:

1. A pulley, plates located at opposite The inner faces of thereof, the inner rings bearing against said 3. A pulley, a journal for the pulley, hav' ing shoulders, a packing box in sections at opposite sides of the pulley, means for clamping the sections of the packing box against said shoulders, packing means between the pulley and thepacking box, and packing means surrounding the packing box.

4. A pulley, a journal for the pulley, a

packing box associated with the pulley, a packing'between the pulley and the packing box,.a, packing surrounding the packing box,

IlllllltTSPIlIlg for holding the latter packing place. l

"5. A'pulley,a'journal for the pulley, a packing box associated with the pulley, a packing between the pulley and the packing box, a packing surrounding the packing box,

an annular spring for holding the letter packing in place, and at strip bet-ween saidlstter packing and spring.

6', A pulley, a journal forthe pulley, a pitching ')-OX. in sections located at opposite sides oi and out of content with the pulley, the sections having inturned flanges. put-l;- ings zit opposite sides of the web of the pul- Q l located between the hub thereof end hung-es, ssi'djournel being shouldered, inesns for elemphig the sections of the packinn" or; against the shouldered portion of the l, and packing rings surrounding the I 1, t. puiley, n journsl l'o'r the pulley, s peeking box in sections located at opposite sides oi'hnd out of contact with the-pulley, the seotions having inturned flanges, puck-- op'iosite sides of the web of the pul A tl'iCi located liietv-reen the hub thereof and :1 "ix-angers, said journal being shouldered. in]? also 11g the sestions (If the parole J1 hex against heshouldered portion of the journal, peeking ring, surrounding the flanges, end annular springs surrounding the respective rings, the Web of the pulley having channels toreteive ssid prings.

' A pulley, it pin having a shouldered per-- l i l l l tion between its ends, on which said pulley turns, plates at opposite sides of'said shouldered portion, and other plates against'the first mentioned plates, the pin extending through the several plates, straps through which the pin extends, nuts fitted to said pin for joining the several plates together and the inner ones against the ends of said shouldered portion, said inner plates havinginturned annular flanges, zind packings between said inturnod annular flanges and the pulley.

9, A pulley, a pin for the pulley, having shoulders, side plates fitted'to the pin and -uln1tting against the shoulders, a pulley rotative around the journal, packings surrounding the pulley, the side plates being flanged to inelose said psolzings, other packings surroumling -the flanges of said plates, and

, springs for holding the last-mentioned packings in plane.

in. testimony Whereol I have hereunto set in hand in presence ol' two subscribing witl l l 1 

